Ever since Doctor Who returned to screens in 2005, the show's modern era has largely stuck to a common post-regeneration rule, but Peter Capaldi strayed from this trend when he took on the role of the Twelfth Doctor. As one of two main Doctors to serve under showrunner Steven Moffat, Capaldi debuted as the show's title character in 2013, before making his first full appearance in 2014 and leaving in 2017. Twelve is remembered for his blunt personality and thick Scottish accent, but his legacy also includes a canonical occurrence that hadn't happened since Doctor Who's classic era.

Doctor Who's modern era brought the franchise out of dormancy for the first time since Paul McGann's failed 1996 movie. With the introduction of Ncuti Gatwa as FIfteen in 2023, there have been six main actors to play the part since Doctor Who returned. However, of all the actors to play the Doctor since the revival,...